Data

A bathymetric Digital Elevation Model (DEM) of the George V and Terre Adelie continental shelf and margin

Australian Ocean Data Network
Beaman, R.J. ; BEAMAN, ROBIN JORDAN
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://data.aad.gov.au/metadata/records/GVdem_2008&rft.title=A bathymetric Digital Elevation Model (DEM) of the George V and Terre Adelie continental shelf and margin&rft.identifier=http://data.aad.gov.au/metadata/records/GVdem_2008&rft.publisher=Australian Antarctic Data Centre&rft.description=This dataset comprises Digital Elevation Models (DEMs) of varying resolutions for the George V and Terre Adelie continental margin, derived by incorporating all available singlebeam and multibeam point depth data into ESRI ArcGIS grids. The purpose was to provide revised DEMs for Census of Antarctic Marine Life (CAML) researchers who required accurate, high-resolution depth models for correlating seabed biota data against the physical environment. The DEM processing method utilised all individual multibeam and singlebeam depth points converted to geographic xyz (long/lat/depth) ASCII files. In addition, an ArcGIS line shapefile of the East Antarctic coastline showing the grounding lines of coastal glaciers and floating ice shelves, was converted to a xyz ASCII file with 0 m as the depth value. Land elevation data utilised the Radarsat Antarctic Mapping Project (RAMP) 200 m DEM data converted to xyz ASCII data. All depth, land and coastline ASCII files were input to Fledermaus 3DEditor visualisation software for removal of noisy data. The cleaned point data were then binned into a gridded surface using Fledermaus DMagic software, resulting in a 0.001-arcdegree (~100 m) resolution DEM with holes where no input data exists. ArcGIS Topogrid software was used to interpolate across the holes to output a full-coverage DEM. ArcGIS was used to produce the additional 0.0025-arcdegree (~250 m) and 0.005-arcdegree (~500 m) resolution grids. Full processing details can be viewed in: Beaman, R.J., O'Brien, P.E., Post, A.L., De Santis, L., 2011. A new high-resolution bathymetry model for the Terre Adelie and George V continental margin, East Antarctica. Antarctic Science 23(1), 95-103. doi:10.1017/S095410201000074XProgress Code: completedStatement: The various multibeam datasets were processed within acquisition software by the originating agencies in order to correct for sound velocity variations within the water column and the removal of noise. No account has been taken of tidal range, so all depth data is assumed to have a vertical datum of mean sea-level (MSL). The final DEMs conform to Order 2 of the International Hydrographic Organisation (IHO) Standards for Hydrographic Surveys Special Publication 44 - 5th Edition February 2008. Both Total Horizontal Uncertainty (THU) and Total Vertical Uncertainty (TVU) increase according to depth, so the maximum allowable THU is 30m up to 100m depth, 70m up to 500m depth, 120m up to 1000m depth, 220m up to 2000m depth, and so on. Realistically, however, the accuracy of GPS used for positioning during modern surveys is far better than the maximum allowable THU for Order 2 surveys, and so the THU figures quoted here are very conservative. The maximum allowable TVU is 2.5 m up to 100 m; 11.5 m up to 500 m depth; 23 m up to 1000 m depth; 46 m up to 2000 m depth and so on.&rft.creator=Beaman, R.J. &rft.creator=BEAMAN, ROBIN JORDAN &rft.date=2009&rft.coverage=westlimit=138; southlimit=-69; eastlimit=148; northlimit=-63&rft.coverage=westlimit=138; southlimit=-69; eastlimit=148; northlimit=-63&rft.coverage=uplimit=2391; downlimit=0&rft.coverage=uplimit=2391; downlimit=0&rft.coverage=uplimit=4108; downlimit=0&rft.coverage=uplimit=4108; downlimit=0&rft_rights=This metadata record is publicly available.&rft_rights=The data are available for non-commercial use. The files are publicly available for download from the provided URLs.&rft_rights= https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=GVdem_2008 when using these data. Users of the gvdem grid must include the following references in any subsequent publications using this dataset: De Santis, L., Brancolini, G., Accettella, D., Cova, A., Caburlotto, A., Donda, F., Pelos, C., Zgur, F., Presti, M., 2007. New insights into submarine geomorphology and depositional processes along the George V Land continental slope and upper rise (East Antarctica). In: A.K. Cooper and C.R. Raymond (Editors), 10th International Symposium on Antarctic Earth Sciences, August 26-31 2007. Scientific Committee on Antarctic Research, Santa Barbara, U.S.A., pp. 1-5. Beaman, R.J., O'Brien, P.E., Post, A.L., De Santis, L., 2011. A new high-resolution bathymetry model for the Terre Adelie and George V continental margin, East Antarctica. Antarctic Science 23(1), 95-103. doi:10.1017/S095410201000074X http://creativecommons.org/licenses/by/4.0/).&rft_rights=Portable Network Graphic&rft_rights=https://i.creativecommons.org/l/by/3.0/88x31.png&rft_rights=Creative Commons by Attribution logo&rft_rights=Attribution 4.0 International (CC BY 4.0)&rft_rights=Legal code for Creative Commons by Attribution 4.0 International license&rft_rights=Attribution 4.0 International (CC BY 4.0)&rft_rights= https://creativecommons.org/licenses/by/4.0/legalcode&rft_subject=oceans&rft_subject=elevation&rft_subject=EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION&rft_subject=EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH&rft_subject=EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY&rft_subject=EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > CONTINENTAL MARGINS&rft_subject=EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY&rft_subject=bathymetry&rft_subject=soundings&rft_subject=echo sounders&rft_subject=multibeam sonar&rft_subject=ECHO SOUNDERS&rft_subject=SHIPS&rft_subject=IPY > INTERNATIONAL POLAR YEAR&rft_subject=CAML > CENSUS OF ANTARCTIC MARINE LIFE&rft_subject=COML > CENSUS OF MARINE LIFE&rft_subject=EBA > Evolution and Biodiversity in the Antarctic&rft_subject=AMD/AU&rft_subject=CEOS&rft_subject=AMD&rft_subject=OCEAN > SOUTHERN OCEAN > George V&rft_subject=OCEAN > SOUTHERN OCEAN > Terre Adelie&rft_subject=CONTINENT > ANTARCTICA&rft_subject=GEOGRAPHIC REGION > POLAR&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=GVdem_2008 when using these data.

Users of the gvdem grid must include the following references in any subsequent publications using this dataset:

De Santis, L., Brancolini, G., Accettella, D., Cova, A., Caburlotto, A., Donda, F., Pelos, C., Zgur, F., Presti, M., 2007. New insights into submarine geomorphology and depositional processes along the George V Land continental slope and upper rise (East Antarctica). In: A.K. Cooper and C.R. Raymond (Editors), 10th International Symposium on Antarctic Earth Sciences, August 26-31 2007. Scientific Committee on Antarctic Research, Santa Barbara, U.S.A., pp. 1-5.

Beaman, R.J., O'Brien, P.E., Post, A.L., De Santis, L., 2011. A new high-resolution bathymetry model for the Terre Adelie and George V continental margin, East Antarctica. Antarctic Science 23(1), 95-103. doi:10.1017/S095410201000074X
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Attribution 4.0 International (CC BY 4.0)

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This metadata record is publicly available.

The data are available for non-commercial use. The files are publicly available for download from the provided URLs.

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Brief description

This dataset comprises Digital Elevation Models (DEMs) of varying resolutions for the George V and Terre Adelie continental margin, derived by incorporating all available singlebeam and multibeam point depth data into ESRI ArcGIS grids. The purpose was to provide revised DEMs for Census of Antarctic Marine Life (CAML) researchers who required accurate, high-resolution depth models for correlating seabed biota data against the physical environment. The DEM processing method utilised all individual multibeam and singlebeam depth points converted to geographic xyz (long/lat/depth) ASCII files. In addition, an ArcGIS line shapefile of the East Antarctic coastline showing the grounding lines of coastal glaciers and floating ice shelves, was converted to a xyz ASCII file with 0 m as the depth value. Land elevation data utilised the Radarsat Antarctic Mapping Project (RAMP) 200 m DEM data converted to xyz ASCII data. All depth, land and coastline ASCII files were input to Fledermaus 3DEditor visualisation software for removal of noisy data. The cleaned point data were then binned into a gridded surface using Fledermaus DMagic software, resulting in a 0.001-arcdegree (~100 m) resolution DEM with holes where no input data exists. ArcGIS Topogrid software was used to interpolate across the holes to output a full-coverage DEM. ArcGIS was used to produce the additional 0.0025-arcdegree (~250 m) and 0.005-arcdegree (~500 m) resolution grids. Full processing details can be viewed in: Beaman, R.J., O'Brien, P.E., Post, A.L., De Santis, L., 2011. A new high-resolution bathymetry model for the Terre Adelie and George V continental margin, East Antarctica. Antarctic Science 23(1), 95-103. doi:10.1017/S095410201000074X

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Progress Code: completed
Statement: The various multibeam datasets were processed within acquisition software by the originating agencies in order to correct for sound velocity variations within the water column and the removal of noise. No account has been taken of tidal range, so all depth data is assumed to have a vertical datum of mean sea-level (MSL). The final DEMs conform to Order 2 of the International Hydrographic Organisation (IHO) Standards for Hydrographic Surveys Special Publication 44 - 5th Edition February 2008. Both Total Horizontal Uncertainty (THU) and Total Vertical Uncertainty (TVU) increase according to depth, so the maximum allowable THU is 30m up to 100m depth, 70m up to 500m depth, 120m up to 1000m depth, 220m up to 2000m depth, and so on. Realistically, however, the accuracy of GPS used for positioning during modern surveys is far better than the maximum allowable THU for Order 2 surveys, and so the THU figures quoted here are very conservative. The maximum allowable TVU is 2.5 m up to 100 m; 11.5 m up to 500 m depth; 23 m up to 1000 m depth; 46 m up to 2000 m depth and so on.

Data time period: 2008-03-17 to 2010-07-16

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148,-63 148,-69 138,-69 138,-63 148,-63

143,-66

text: westlimit=138; southlimit=-69; eastlimit=148; northlimit=-63

text: uplimit=2391; downlimit=0

text: uplimit=4108; downlimit=0

Subjects
AMD | AMD/AU | CAML > CENSUS OF ANTARCTIC MARINE LIFE | CEOS | COML > CENSUS OF MARINE LIFE | CONTINENT > ANTARCTICA | EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION | EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY | EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY | EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > CONTINENTAL MARGINS | EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH | EBA > Evolution and Biodiversity in the Antarctic | ECHO SOUNDERS | GEOGRAPHIC REGION > POLAR | IPY > INTERNATIONAL POLAR YEAR | OCEAN > SOUTHERN OCEAN > George V | OCEAN > SOUTHERN OCEAN > Terre Adelie | SHIPS | bathymetry | echo sounders | elevation | multibeam sonar | oceans | soundings |

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Other Information
Download point for the data - ArcInfo ascii file - Bathymetric DEM 138E-148E, 63S-69S, 0.001-arcdegree resolution (nominally 100 m) (GET DATA)

uri : https://data.aad.gov.au/eds/3062/download

Download point for the data - ArcInfo ascii file - Bathymetric DEM 138E-148E, 63S-69S, 0.0025-arcdegree resolution (nominally 250 m) (GET DATA)

uri : https://data.aad.gov.au/eds/3063/download

Download point for the data - ArcInfo ascii file - Bathymetric DEM 138E-148E, 63S-69S, 0.005-arcdegree resolution (nominally 500 m) (GET DATA)

uri : https://data.aad.gov.au/eds/3064/download

Download point for the net CDF files (GET DATA)

uri : https://data.aad.gov.au/eds/4147/download

Download point for the image of the chart (GET DATA)

uri : https://data.aad.gov.au/eds/4272/download

Deep Reef Explorer page (PROJECT HOME PAGE)

uri : http://www.deepreef.org/bathymetry/81-gvdem-bathy.html

Identifiers
  • global : GVdem_2008
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